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TypeScript code kata list

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012 TypeScript - simple functions

Duration

10 minutes

Brief

Create simple, anonymous, and arrow functions.

For more information

BING/GOOGLE: “TypeScript functions”

Instructions

Get tutorial folder or the entire katas-typescript repo.
Open the [before/*.sln] file and execute the kata.
Feel free to execute this kata multiple times because repetition creates motor memory.

Github

• Before (start kata with this)
  
  • https://github.com/robertdunaway/katas-typescript/tree/master/012%20TypeScript%20-%20simple%20functions/before
• After
  
  • https://github.com/robertdunaway/katas-typescript/tree/master/012%20TypeScript%20-%20simple%20functions/after

Kata

Create a simple function that adds two numbers.

    // Create a simple 'add' function.
    function add(a: number, b: number): number {
        return a + b;
    }
    console.log('named function');
    console.log('5 + 2 = ' + add(5, 2));

Create an anonymous function that adds two numbers.

    // Create an ananymous 'add' function.
    var add2 = function (a: number, b: number): number {
        return a + b;
    }
    console.log('anonymous function');
    console.log('5 + 5 = ' + add2(5, 5));

Create an arrow function that adds two numbers.

    // Create a function using the arrow function.
    var add3 = (a: number, b: number): number => {
        return a + b;
    }
    console.log('arrow function');
    console.log('10 + 5 = ' + add3(10, 5));

Next

Take a few minutes and imagine more examples.